Waterproofing-paint for portland-cement structures.



UNI IED SITES THOMAS A. EDISON, OF LLEWELLYN PARK, ORANGE, NEW JERSEY,ASSIGNOR TO NORTh JERSEY PAINT COMPANY, OF STEWARTSVILLE, NEW JERSEY, AGGRPORATION OF NEW JERSEY.

WATERPROOFING-PAINT FOR PORILAND-CEMENT STRUCTURES.

Application filed June 1, 1908.

To all whom it may concern.

Be it known that I, THOMAS ALVA EmsoN, a citizen of the United States,residing at Llewellyn Park, Orange, county of Essex,

and State of New Jersey, have invented. a

certain new and useful W aterproofing-Paint for Portland-CementStructures, of which the following is a description.

My invention relates to an improved paint especially adapted forapplications to dwellings or other structures of Portland cement whichwill be entirely waterproof and which will perfectly penetrate the poresof the cement surface, even when monolithic, so that the paint will bepermanent.

In my application No. 14,575, filed February 6th, 1908, I have suggestedthe use of the petroleum residue known as B. S, which settles out ofcrude petroleum when stored in tanks and which is solid at ordinarytemperatures, as a material from which to manufacture a paint forwaterproofing cement surfaces, and have described a method of treatmentof this material which gives good results.

The object of the present invention is to provide an improved Waterproofpaint for this purpose having superior waterproofing qualities, and animproved method of treatment for making the paint.

In the practice of my invention I take a suitable uantity of theresiduum B. 8., and dissofve it in a solvent. For the solvent, Ipreferably use warm petroleum benzin, although benzol or turpentine maybe used. The material having been dissolved, it is allowed to cool andremain quiescent until the insoluble portion settles out or it may befiltered to obtain the same result.

The clear solution is drawn off and used direct, or the solvent may bedistilled off and recovered by condensation, until the residue hasreached the proper consistency at which it may be most effectivelyapplied as a paint.

The solid residue eliminated from the material has practically nowaterproofing qualities, and its presence is objectionable since thesolid insoluble particles interfere with the effective penetration ofthe waterproofing material into the pores of the cement oril othersurface and such solid particles Specification oi Letters Patent.

Patented Jan. 12, 1909.

Serial No. 436,105.

also prevent the formation of continuous films of the waterproofingmaterial, and to this extent the waterproofing character 1 thereof isaffected.

The paint so made is applied to cement walls, with a brush or otherwise,and the solvent carries the material some distance below the surface ofthe slightly porous cement, even in monolithic constructions. Thesolvent quickly evaporates and leaves the waterproofing agent in thepores and covering the exposed surface. In this condition the materialwhen so applied is somewhat sticky, although not to the extent as whenthe solid residue is not removed, and when this stickiness isundesirable, as for example, would be the case in the interior of ahouse, I add to the solution a sufficient quantity of an oxidizablematerial, such as strongly boiled linseed oil, which is also soluble inthe solvent used. Upon the evaporation of the solvent, the linseed oilin a short time oxidizes so as to neutralize the sticky qualities of thewaterproofing paint without destroying its waterproofing and otherdesirable qualities.

It will, of course, be understood that various pigments and oil colorsmay be added to the solution in order to secure any desired tint.

For the treatment of a flat surface, as for example, the roof of acement house, I carry the distillation of the solvent somewhat'further,until the residue is of a pasty or semisolid consistency when cold. Toapply the paint so formed to a flat surface it is first melted to a thinliquid and applied hot to the surface. In this case the naturalstickiness of the material can be neutralized. by applying over it afine powder, such as chalk, fine clay, or talc powder.

While I have particularly described my improved paint for use withcement structures, it will be understood that it may be employed upon orwith other surfaces to make them waterproof, and that it may be alsoused in connection with fibrous materials, such as bags for containingcement or hygroscopic substances, for the purpose of excluding moisturetherefrom.

Having now described my invention, what I claim as new is the following:

1. The method of making a Waterproofing paint which consists ofdissolving the petro leum residue known as B. S. in a suitable solventand removing the insoluble portion thereof, substantially as set forth.

2. The method of making a waterproofing paint which consists indissolving the petroleum residue known as B. S. in a suitable solvent,removing the insoluble portion, and distilling off a portion of thesolvent, substantially as set forth.

3. The method of making a waterproofing paint which consists indissolving the petroeum residue known as B. S. in petroleum benzin andremoving the insoluble portion, substantially as set forth.

4. The method of making a waterproofing aint which consists indissolving the petr0- eum residue known as B. S. in petroleum benzin,removing the insoluble portion and distilling off a portion of thesolvent, substantially as set forth.

5. As a new article of manufacture, a waterproofing paint comprising asuitable solvent and that part of the petroleum residue known as B. S.which is soluble there- I residue known as B. S. which is solubletherein, and free from the insoluble portion thereof, substantially asset forth.

7. A waterproofing paint comprising a suitable solvent and that portionof the pe troleum residue known as B. S. soluble therein, free from theinsoluble portion thereof,--and boiled linseed oil also dissolved in thesolvent, substantially as set forth.

8. A waterproofing paint comprising petroleum benzin and that portion ofthe petroleum residue known as B. S. soluble therein, and free from theinsoluble portion thereof, and a colored pigment, substantially as setforth.

This specification signed and witnessed this 27th day of May 1908.

THOS. A. EDISON.

Witnesses:

FRANK L. DYER, ANNA R. KLEHM.

It is hereby certified that in Letters Patent No. 909,169, grantedJanuary 12, 1909,

upon the application of Thomas A. Edison, of Llewellyn Park, Orange, NewJersey,

for an improvement in Waterproofing-Paint for Portland-CementStructures, an

error appears in the printed specifications requiring correction, asfollows; In line 16,

page 1, the number 14,575 should read 414,575; and that the said LettersPatent should be read withthis correction therein that the same mayconform tothe record of the case in the Patent Olfice.

Signed and sealed this 23rd day of February, A. D., 1909.

G. O. BILLINGS,

Acting Commissioner of Patents.

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